Question

The chemical composition of slag formed during the smelting process in the extraction of copper is

• A. $Cu _{2} O + FeS$
• B. $FeSiO _{3}$
• C. $CuFeS _{2}$
• D. $Cu _{2} S + FeO$

Answer 1

Answer: (D)

$Cu _{2} S + FeO$

Answer 2

During smelting process of copper from copper pyrites reactions are
$Cu _{2} O + FeS \rightarrow Cu _{2} S + FeO$
$2 FeS +3 O _{2} \rightarrow 2 FeO +2 SO _{2}$